Chinese Stealth Tech- many think China borrowed fighter technology. I also think it would be foolish not to use proven ideas. Plus if your designs can be taken the only main advantages are strategy and training. This where the majors have the edge.
The SAAB 21 was a Swedish fighter/attack aircraft from SAAB that first took to the air in It was designed as a twin boom pusher configuration, where the propeller was mounted in the rear of the fuselage, pushing the aircraft forward.